Improved axle-box for carriages



-D. JEWETT.

Axle Box.

No. 102,127. Patented April 19, 1870.

anion fitatca atwt can.

Letters Patent-N 102,127, dated April 19, 1870.

IMPRQVED AXLE-BOX FOR CARRIAGES.

The Schedule referred to in these Le'ttera Patent and making part of thesame.

To all whom it may concern -Be it known that I, DAVID JuwE'rr', of Lynn,in the county of Essex and State of Massachusetts, have invented certainImprovements in Axles and Axle- Boxes for Carriages; and I herebydeclare that the following is a full, clear, and exact descriptionthereof, I -reference being bad to the accmnpanyingdrawings from theaxle-box, and to prevent the lubricating material from escapingtherefrom and My invention also consists in providing that portion ofthe axle which enters the box with two or more collars or circular ringsof hardened steel, which bear upon hardened steel slu'taceswithin theinterior of the box, the bearing-surtaces of the saidrings being oflimited extent, thus relieving much oi the friction experienced in axlesof the ordinary construction.

To enable othersskilled in the art to understand and use my invention, 1will proceed to describe the manner in which I have carried it out.

In the said drawings- A isaearriage-hub, within the ends of which aresnugly fitted the-metallic boxes B 0, provided with thimbles orbushings, b c, of hardened steel.

dis also a thimble or bushing of hardened steel, fitted within theinterior of the hub about halt way between the inner ends of thebushings b 0.

These bushings or thimblcs serve as bearings for a corresponding numberof circular rings a, f,g, of hardened steel, formed on the journal ofthe axle D, the object of this construction bei'ngto reduce the amountof lmaring-sm'tace in as great a degree as possible compatiblewithstrength, thereby relieving much of the friction'o t the parts, andrequiring to be seldom lubricated ;,the lubricating material consistingof powdered black-lead, which is placed around the aide in the chambersa between the rings of and f g.

By using black-lead as a lulu-icating material, the heating of the partsis avoided.

The outer end of the journal ot'thcaxlc is provided with a screw-thread,over which turns a nut, G, in the outer surface of the circular portioni of which is out an annular groove, while the inner end of the journalis provided with a circular collar, 1), in the outer surface of which isalso fill-med an annular groove; these grooves are for the reception ofelastic packing, k, which, when the collar l) and nut G are in placewithin the circular flanged recesses prepared for them in the outside ofthe boxes '15 O, snugly close the joints atthese points, pressingoutward against the flanges l 1, thereby effectually excluding the dirt,dust, 850., and preventing the escape of the lubricating materials i Itis evident that a continuous bushing may be employed, or that the wholeof the axle-box, or its two parts]; 0, becomposed of steel; and that myimprove ments may be applied to the shat'ting of machinery withoutdeparting from the spirit of my invention.

Claim.

What 1 claim as my invention, and desire to secure by Letters Patent,is- I 'Ihe grooved collar E and the grooved nut G for the reception ofelastic packing It, in combination with an axle, D, substantially asandt'or the purpose described. \Vitness my hand this. day of March, AvD. 1870 DAVID JEWETT. Witnesses:

N. W. STEARNS, \V. J. CAMBRIDGE.

